package com.nageoffer.shortlink.admin.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.collection.CollUtil;
import com.alibaba.fastjson2.JSON;
import com.baomidou.mybatisplus.core.conditions.Wrapper;
import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.conditions.update.LambdaUpdateWrapper;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.nageoffer.shortlink.admin.common.constants.RedisCacheConstant;
import com.nageoffer.shortlink.admin.common.convention.exception.ClientException;
import com.nageoffer.shortlink.admin.common.convention.result.Results;
import com.nageoffer.shortlink.admin.common.enums.UserErrorCodeEnum;
import com.nageoffer.shortlink.admin.config.RBloomFilterConfiguration;
import com.nageoffer.shortlink.admin.dao.entity.UserDO;
import com.nageoffer.shortlink.admin.dao.mapper.UserMapper;
import com.nageoffer.shortlink.admin.dto.req.UserLoginReqDTO;
import com.nageoffer.shortlink.admin.dto.req.UserRegisterReqDTO;
import com.nageoffer.shortlink.admin.dto.req.UserUpdateReqDTO;
import com.nageoffer.shortlink.admin.dto.resp.UserLoginRespDTO;
import com.nageoffer.shortlink.admin.dto.resp.UserRespDTO;
import com.nageoffer.shortlink.admin.service.GroupService;
import com.nageoffer.shortlink.admin.service.UserService;
import lombok.RequiredArgsConstructor;
import org.antlr.v4.runtime.Token;
import org.redisson.api.RBloomFilter;
import org.redisson.api.RLock;
import org.redisson.api.RedissonClient;
import org.springframework.beans.BeanUtils;
import org.springframework.dao.DuplicateKeyException;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;

import static com.nageoffer.shortlink.admin.common.enums.UserErrorCodeEnum.USER_EXIST;
import static com.nageoffer.shortlink.admin.common.enums.UserErrorCodeEnum.USER_SAVE_ERROR;

/**
 * 用户接口实现层
 */
@Service
@RequiredArgsConstructor
public class UserServiceImpl extends ServiceImpl<UserMapper, UserDO> implements UserService {

    private final RBloomFilter<String> userRegisterCachePenetrationBloomFilter;

    private final RedissonClient redissonClient;

    private final StringRedisTemplate stringRedisTemplate;

    private final GroupService groupService;

    @Override
    public UserRespDTO getUserByUsername(String username) {
        LambdaQueryWrapper<UserDO> queryWrapper = Wrappers.lambdaQuery(UserDO.class)
                .eq(UserDO::getUsername, username);
        UserDO userDO = baseMapper.selectOne(queryWrapper);
        if(userDO == null)throw new ClientException(UserErrorCodeEnum.USER_NULL);
        UserRespDTO result = new UserRespDTO();
        BeanUtils.copyProperties(userDO,result);
        return result;
    }

    @Override
    public Boolean hasUsername(String username) {
        return !userRegisterCachePenetrationBloomFilter.contains(username);
    }

    @Override
    public void register(UserRegisterReqDTO requestParam) {
        if(!hasUsername(requestParam.getUsername())){
            throw new ClientException(UserErrorCodeEnum.USER_NAME_EXIST);
        }

        RLock lock = redissonClient.getLock(RedisCacheConstant.LOCK_USER_REGISTER_KEY + requestParam.getUsername());
        try{
            if (!lock.tryLock()) {
                throw new ClientException(UserErrorCodeEnum.USER_NAME_EXIST);
            }

            try {
                int insert = baseMapper.insert(BeanUtil.toBean(requestParam, UserDO.class));
                if(insert < 1){
                    throw new ClientException(USER_SAVE_ERROR);
                }
            } catch (DuplicateKeyException e) {
                throw new ClientException(USER_EXIST);
            }

            userRegisterCachePenetrationBloomFilter.add(requestParam.getUsername());
            groupService.saveGroup(requestParam.getUsername(),"默认分组");
        }finally {
            lock.unlock();
        }

    }

    @Override
    public void update(UserUpdateReqDTO requestParam) {
        //TODO 验证当前用户是否为登录用户
        LambdaUpdateWrapper<UserDO> updateWrapper = Wrappers.lambdaUpdate(UserDO.class).eq(UserDO::getUsername, requestParam.getUsername());
        baseMapper.update(BeanUtil.toBean(requestParam,UserDO.class),updateWrapper);

    }

    @Override
    public UserLoginRespDTO login(UserLoginReqDTO requestParam) {
        LambdaQueryWrapper<UserDO> queryWrapper = Wrappers.lambdaQuery(UserDO.class)
                .eq(UserDO::getUsername, requestParam.getUsername())
                .eq(UserDO::getPassword, requestParam.getPassword())
                .eq(UserDO::getDelFlag, 0);
        UserDO userDO = baseMapper.selectOne(queryWrapper);
        if(userDO == null)throw new ClientException("用户记录不存在");
        Map<Object, Object> hasLoginMap = stringRedisTemplate.opsForHash().entries("login_" + requestParam.getUsername());
        if(CollUtil.isNotEmpty(hasLoginMap)){
            String token = hasLoginMap.keySet().stream()
                    .findFirst()
                    .map(Object::toString)
                    .orElseThrow(() -> new ClientException("用户登录异常"));
            return new UserLoginRespDTO(token);
        }

        String uuid = UUID.randomUUID().toString();
        stringRedisTemplate.opsForHash().put("login_" + requestParam.getUsername(), uuid, JSON.toJSONString(userDO));
        stringRedisTemplate.expire("login_" + requestParam.getUsername(),30L,TimeUnit.DAYS);
        return new UserLoginRespDTO(uuid);
    }

    @Override
    public Boolean checkLogin(String username,String token) {
        return stringRedisTemplate.opsForHash().get("login_" + username,token) != null;
    }

    @Override
    public void logout(String username, String token) {
        if(!checkLogin(username,token))throw new ClientException("用户Token不存在或用户未登录");

        stringRedisTemplate.delete("login_" + username);
    }
}
